<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"> </el-alert>
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs tab-position="left" v-model="activeIndex" @tab-click="tabClicked" :before-leave="tabsToggle">
          <el-tab-pane label="基本信息">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类">
              <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cascaderprops" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyParamsList" :key="item.attr_id">
              <!-- <el-tag></el-tag> -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="db" v-for="(db, i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyParamsList" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- upload上传为无效的token 需要在请求头中添加token -->
            <el-upload
              class="upload-demo"
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerToken"
              :on-success="handelSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btn" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog title="预览" :visible.sync="previewDialogVisible" width="50%">
      <img :src="tmp_path" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      addForm: {
        goods_name: '',
        goods_price: '',
        goods_weight: '',
        goods_number: '',
        goods_cat: [],
        goods_introduce: '',
        pics: []
      },
      addFormRules: {
        goods_name: { required: true, message: '请输入商品名称', trigger: 'blur' },
        goods_price: { required: true, message: '请输入商品价格', trigger: 'blur' },
        goods_weight: { required: true, message: '请输入商品重量', trigger: 'blur' },
        goods_number: { required: true, message: '请输入商品数量', trigger: 'blur' }
      },
      catelist: [],
      cascaderprops: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      activeIndex: '0',
      manyParamsList: [],
      onlyParamsList: [],
      headerToken: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewDialogVisible: false,
      tmp_path: ''
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      this.catelist = res.data
    },
    handleChange() {
      //   console.log(this.cascaderId);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        return
      }
    },
    //   在tabs标签发生切换时，发生的钩子函数 如果返回的时false 则阻止切换
    tabsToggle(activeName, oldActiveName) {
      if (oldActiveName === '0') {
        if (this.addForm.goods_cat.length !== 3) {
          this.$message.error('未选择正确的商品分类')
          return false
        } else if (this.addForm.goods_name.trim() === '') {
          this.$message.error('请选择商品名称')
          return false
        } else if (this.addForm.goods_price.trim() === '') {
          this.$message.error('请输入商品价格')
          return false
        } else if (this.addForm.goods_weight.trim() === '') {
          this.$message.error('请输入商品重量')
          return false
        } else if (this.addForm.goods_number.trim() === '') {
          this.$message.error('请输入商品数量')
          return false
        }
      }
    },
    async tabClicked() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'many'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败')
        }
        this.$message.success('获取动态参数列表成功')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        })
        this.manyParamsList = res.data
        // console.log(this.manyParamsList)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'only'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败')
        }
        this.$message.success('获取参数列表成功')
        this.onlyParamsList = res.data
      }
    },
    handlePreview(file) {
      console.log(file)
      this.tmp_path = file.response.data.url
      this.previewDialogVisible = true
    },
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const index = this.addForm.pics.findIndex(item => item === filePath)
      this.addForm.pics.splice(index, 1)
    },
    handelSuccess(response) {
      // console.log(response);
      const picInfo = {
        pic: response.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
      //   console.log(this.addForm.pics)
    },
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要的表单项!')
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        this.manyParamsList.forEach(item => {
          form.attrs.push({
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          })
        })
        this.onlyParamsList.forEach(item => {
          form.attrs.push({
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          })
        })
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 15px 0;
  margin-left: 200px;
}
</style>
